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CF023
MsgQue OverFlow
An exceptional instance occurred due to the unexpected Parameter in the System F/W.
Relevant Electrical Components, Units, and Options - MFP Control Board (PWB-MFP)
Try to reset it. If it is still showing up, you should try a new firmware version. If it is not working with a new firmware, you should check all the connection to the MFP Control Board. In the worst case scenario, you should change the board. I hope a reset will do the job

The error code is displayed in 2 section on the display on the zoom dosplay and the number display.C0400 Exposure lamp malfunction.C0410 Exposure lamp thermistor malfunction.Verify the exposure lamp continuity and the thermistor continuity.To reset error code open the copier and press the reset microswitch located on the rear PWB panel ,close the machine front door.

In minolta copiers the C5xx codes refer to fuser unit malfunctions.Verify the fuser unit gears,the fuserheater lamp continuity and the thermofuses continuity.To reset the codes please the copier model and I tell you the reset method.

The copiers CPU is equipped with a self diagnostics function that on detecting a malfunction,gives the corresponding malfunction code on the touch panel.Resetting a malfunction:- Press the trouble reset switch on the technical representative setting switches board to reset fusing and exposure lamp related malfunctions.(code: C400,410,420-expo;C500,510,520-fusing unit)- For any other malfunctions,open and close the front door or turn OFF and ON the power switch.C1441 CCD failure(clamp adjustment failure).Reset the malfunction,check that the original glass is properly installed.Check for extraneous light and check to see if CCD Assy and mirrors are installed at the correct position.If the same malfunction is detected again,change image processing board.

COBAo = Elevate mechanism malfunction.
The exit tray home position sensor is not blocked even after the lapse of a given period of time after the tray has started moving up.
An encoder clock input is not detected within a given period of time during operation of the tray.Check the sensors,motors and his connectors.
How to reset:
1. Press the trouble reset switch on the Tech.Rep.Setting Switches Board to reset the following malfunctions:scanner,fusing,exposure related malfunctions and C3FF.
2. For any other malfunctions open and close the front door or turn OFF and ON the power switch.

The C0048 error code not exist.Malfunction resetting procedure:Turn OFF,then ON the power switch or open and close the side cover for all malfunctions except C05XX codes.Use Trouble reset of the Initial screen to reset all malfunctions.To right side the touch panel(screen display)near display contrast button exist a little hole (reset switch).Insert a hairpin to touch the switch.Enter "3" from the 10-key pad when " * " appears at the center on the left side of the screen while the start up screen being displayed.Touch TROUBLE RESET,and EXIT to go back to the basic screen.

This code is related to fusing pressure, which could mean fusing unit malfunction.
Put paper clip through a hole under LED cleaning pads inside the front door to reset.
Caution!!! Not recommend for the end user to reset fusing related codes since it could result in a fire.